Experts: Nuclear chain reactions may have lasted over 7 months at Fukushima — Neutron leakage from ‘active’ molten fuel — “Core producing radioactive sulfur” — Top Gov’t Official: MOX fuel could be neutron source

Ex-Fukushima Daiichi engineer as ‘cold shutdown’ declared: Fuel rods still active and alive — Most worried about recriticality — Tepco must measure neutrons near core (VIDEO)

L.A. Times: Speculation that “supercritical fission event” occurred at Fukushima reactor irradiating plutonium, says nuclear expert — Explosion so massive investigators found fuel rod fragments a mile away

NHK: Tepco told to find ways of measuring temperature at Reactor No. 2 and report by tomorrow — Still claimed no xenon detected

82°C at Reactor No. 2 — Keeps rising even after injection of more water — Tepco “set to dump in boric acid”

Nuclear Industry Website: Recriticality test detects “very low traces” of fission products at Reactor No. 2 — Tepco then injected boric acid as a precaution against chain reactions

Exposed? Asahi: Water may not be reaching part of melted nuclear fuel from Reactor No. 2, says unnamed Tepco official

Tepco: Recriticality “probably” did not occur at Reactor No. 2 — “Difficult to judge” whether temperature rising or falling

Bloomberg: “Nuclear reaction threat” as temperature rises — Head of Japan nuke institute: “Nobody is sure about the location of melted fuel — A similar incident will probably occur again”

Bloomberg: Tepco injects boric acid to prevent criticality at Reactor No. 2

Tepco: Water injections may no longer be able to properly cool down melted nuclear fuel in Reactor No. 2 — Says criticality is not taking place (VIDEO)

Yomiuri: Former Japan PM ‘hints’ of recriticality at Fukushima — Found Chlorine-38 in Reactor No. 1 water tested at research institute


NYT on Recriticality: Japan nuclear prof. says chain reaction at Fukushima can’t be ruled out — Disagrees with expert in America who says it’s unlikely

Iodine-131 detected in Tokyo at multiple locations during November — 350 bq/kg at Kita garbage facility

Radioactive iodine found in Gunma at 3 sewage plants — “Possibility of recriticality again”

Radiation expert: “I’m not ruling out a nuclear bomb-type explosion” at Fukushima (VIDEO)

Busby: On-going fission is occurring at Fukushima — Either a recent “enriched uranium fission” or an “explosive criticality”

CNN: Tepco’s claim of ‘spontaneous’ fission is an “improbable phenomenon” says nuke professor — Strange that such a “rare” event was detected almost immediately after sampling began?

Japan Times: It is now a “grave situation” at Fukushima — “Plutonium fission” mentioned for first time — “Criticality is very likely to have occurred”

Boric acid apparently not working to stop chain fission reactions because Xenon is still being detected — Tepco says this is reason why they claim ‘spontaneous’ fission, not sustained criticality

Tepco blames ‘spontaneous’ and ‘natural’ nuclear fission for radioactive xenon… What about the 14,000% increase in Krypton-85?

New fission raises “startling questions” says NYT — Koide: Harmful radioactive material in danger of leaking after a re-criticality